Metallized dianisidine dyes



compounds of polyazo dyestufls having the following gen- 2,970,993 Patented Feb. 7, 1961 United States ate'nf 9 ice I,

in either order, the resulting compound diazotized and finally coupled wth Py. 2,970,993 The desulting triazo compound is subjected to coppering treatment by heating with an aqueous solution of a METALLIZED DIANISIDINE DYES 5 copper salt containing ammonia or a water-soluble amine, Jack F. Morgan, Delmar, and David W. Vollmer, Louand the coppered dyestuffs recovered in the usual manner, donville, N.Y., assiguors to General Aniline & Film e.g. by salting out and filtering. Preparation of dyestuffs Corporation, New York, N.Y., a corporation of Delain accordance with this invention is illustrated in the folware lowing examples, wherein parts and percentages are by No Drawing. Filed Aug. 3, 1954, S61. No. 447,662 mess herwlse mdlcated- .1 Claims. (or. 269-447 Example 1 24.4 parts of dianisidine are dissolved in a solution of 58 parts 20 B. hydrochloric acid and 200 parts of This invention relates to novel coppered polyazo dyes 15 W d Q sohmon cooled to f) flddltlon f yielding grey colorations directly on cellulosic fibers such A 9 of 14 Parts mtnte 30 Parts as cotton and regenerated cellulose rayon, the resu ting f Water 15 added- After 30 mmutes 25 Parts Sodlum colorations having exceptional fastness to light, surviving bicarbonate added followed by W addmon of a anticrease treatment with melamineor urea-formaldeneutra} P P of Parts of j hyderesins Without Substantial diminution, sulfonic acid 1n 200 parts of water. A coupling reaction The dyestuffs of this invention are Complex Copper takes place rapidly and 1s read1ly balanced at the point where no further tetrazotized dianisidine but only the diazo azo compound remains. The reaction mixture is acidified by adding 37.1 parts of 20 B. hydrochloric r r 25 acid, and then cooled to 15 to 20 C. by addition of ice, QN=NON=NlvI-N=NPy and diazotized by adding a solution of 7 parts of sodium l t nitrite in 15 parts of water. After stirring 1 to 2 hours, Oil-6 o-Cu-0 the mixture is neutralized by sodium bicarbonate to a pH of 6. A neutral solution of 22.8 parts of 3-methyl-lwherein Q is the radical of a terminal coupling compop-sulfophenyl-5-pyrazolone in 150 parts of water is slowly nent of the class consisting of naphtholand aminonaphadded to the mixture over a period of 15 to 20 minutes. thol-monoand -disulfonic acids (the adjacent azo group being ortho to the naphtholic hydroxyl group); M is the 40 parts of 8-amino-1-naphthol-5,7-disulfonic acid in 200 radical of a middle coupling component of the class con- .parts of water,,followed by immediate addition of a solusisting of 6 and 7-amino-l-naphthol-monoand -di-sultion of parts of sodium carbonate in 200 parts of water. fonic acids, and Py is a 5-pyrazolone coupling component. The mixture is agitated for several hours to complete cou The dyestuffs of this invention are prepared by coupling pling. A solution of 62.5 parts of hydrated copper sultetrazotized dianisidine in alkaline medium on the one fate in 46 parts of. methylamine in 400 parts of water i hand with 1 mol of 6- or 7-amino-l-naphthol-monoor added and the resulting slurry is heated at 80 to 85 C. .-di-'sulfonic acid, and on the other hand with 1 mo] of a 40 for 4 hours. The resulting dyestufi solution is evaporated na hthol, or amino-naphthol-monoand di-sulfonic acid to ry n he pp red ye tuif thereby recovered. having an unsubstituted nuclear position ortho. to the he dyestuff thus produced has approximately the follow.

naphtholic. hydroxyl groups, diazotizing the amino group ing formula:

eral formula:

on the former component and coupling with 1 mol of a The aforesaid product dyes cotton and regenerated cel- S-pyrazolone coupling component.

lulose rayon desirable grey shades which are very fast to The coupling operations are carried out in any conlight and washing. Exceptional fastness to light is obvenient order. Thus, if coupling component Q contains served in dyeings produced therewith on regenerated a diazotizable amino group, tetrazotized dianisidine is cellulose rayon which survives even conventional antifirst coupled with the component M, the amino group of crease treatment with melamineor urea-formaldehyde thelatter then diazotized and coupled with Py, and the resins. resulting compound finally coupled with Q. Simulta- Variations in the grey shade can be produced by changneous coupling with Q and Py after initial coupling of ing the proportions, respectively, of the pyrazolone comtetrazotized dianisidine with 1 mol of M and subsequent pound and the aminonaphthol-disulfonic acid employed diazotization, yields substantially the same results. Otheras end components. Thus, by increasing the proportion wise-Q and M are coupled with tetrazotized dianisidine of the pyrazolone compound and correspondingly de- There is thereupon rapidly added a neutral solution of creasing the aminonaphthol-disulfonic acid. a somewhat monoazo compound. and then coupling with B-amino-lredder shade of grey is produced, while converse varianaphthol-5,7-disulfonic acid. tion produces a greener shade of grey. If the two end u an Example 3 components are coup ed simultaneously, a scrambled coupling results wherein the product is slightly duller and 5 Parts Of dlamsldme are tetralotlzed, coupled Wlth redder than the product of the example. Instead of meth- 7-amin0-1-naphth0l-3-su1f0nic acid, and the resulting e20 l i ammonia or other water-soluble primary licompound rediazotized as described in Example 1. After phatic amines can be used in the coppering step without adjusting the P t0 6 t0 7 with Sodium bicafbonam. a changing the resultant dyestuff. neutral solution ,of 724.4 parts of l-phenyl-S-pyrazolone- 1Q 3-carboxy acid is added. After stirring 10 to minutes, I a neutral solution of 31.9 parts of 8-amino-1-naphthol- Preparation of a dyestuif by coupling in a different 5,7-disulfonic acid and 40 parts of sodium carbon-ate in Example 2 order is illustrated in this example. 24.4 parts of dianisi- 200 parts of water are added. The mixture is slurried obtained, e.g. by coupling the initial diazo azo compound dine is tetrazotized as in Example 1. parts of sodium several hours and to the resulting thick slurry there are bicarbonate are added thereto, followed by slow addition 5 added 62.5 parts of hydrated copper sulfate, 46 parts of of a neutral solution of 31.9 parts of S-amino-l-naphtholmethylamine and 400 parts of water. The coppering 5,7-disulfonic acid in 250 parts of water so as to obtain treatment is completed by heating at 80 to 85 C. for 4 a balance point where no further tetrazo compound rehours. The dyestuff is salted out, filtered and dried. mains in the mixture. The resulting slurry is added to a Colorations similar to those obtained in Example 1 are solution of 23.9 parts of 7-amino-l-naphthol-Za-sulfonie 20 produced with the resulting dyestufi on cotton. The dyeacid and parts of sodium carbonate in 200 parts of ings are greener than in Example 1 and are fast to light water. The resultant diazo compound is separated by and Washing, especially on regenerated cellulose rayon salting out and filtering. The filter cake is slurried with subjected to anticrease treatment. The formula of the 600 parts of water, and 6.9 parts of sodium nitrite are dyestulf of this example is approximately as follows z' NH: O--Cu O 0 Cu-O l g l g I 000m moss u=N- ON=N- N=N-CH-( |7 do lr NBOaS- \N/ SOrNa added. v'I'he resulting slurry is introduced into an agitated Example 4 2:13:12? 323; it 15:36 381113231: (31:21:16 laltl rgtigg 40 1 24.: parts of dianisidine are tetrazotized as inE xample is then stirred at 0 to 5 C. for one hour and added to a buffer/id by addltloli of 25 parts of sodmmblso of 20 parts of 3 methyl l phenyl s pyrazolone car onate. neutral solut on of 31.9 parts of 7-am1nowith .16 parts of caustic so a i 300 Parts of water The 1-naphthol-3,6-d1sulfomc acid sodium salt in 200 parts of water is added slowly to produce a balanced coupling. nif a'ti x l Aiz ilfggi a 2g? fg sg f g gi i g 28 The resulting slurry is acidified with 37 parts 0f 20 -B; P 8 Te 1 180 f 26- Y P hydrochloric acid, cooled to 10 to 15 C. by addition of per Sulfat a p fid d d aqualimmorfla m ice, diazotized bygradual addition of a solutionof 6.9 1 1 t P5 9 t gzi & f $611 I e Trtfsur tmgt mixtgre parts of sodium nitrite 1H 20 parts of water. After stirea e a o or HI 6 6511 g c P- ring 1 to 2 hours, the mixture is neutralized with 20 arts pered dyestuii is salted out with sodium chloride, filtered of di bi b a to a pH f 5,5 to 7, A iitral olf, and dried. The formula of the resulting dyestuft i8 50 solution of 25.4 parts of 3-methyl-l-p-sulfophenyl-5- as follows: pyrazolone in 200 parts of water is slowly added. After NH, O-Cu o o Cu-O i g r r g I on, moss I!\Y=N-OON= N=N-cH-d do i NaOaS- s osNa This product dyes' cotton and regenerated cellulose stirring 10 to 15 minutes, the mixture is treated with a rayon in very greenish-gray shades of outstanding fastness solution of 35 parts of 8-amino-1maphthol-SJ-disulfonic to light and washing. acid in a mixture of 40 parts of sodium carbonate ini200 By variation in coupling somewhat redder shades are parts of water. The resulting slurry is stirred'several hours to complete coupling, and a solution of 62.5 parts of hydrated copper sulfate and 46 parts of methylamine obtained from tetrazotlzed dianisldine and 1 ammo 8 in 400 parts of water is added and the mixture heated at naphthol-5,7-disulfonic acid, with a monoazo compound to for 4 hours to effect coppering Therfi P P 'F y cfmpling 'diazotized 7amino'l'naphthol3' action mixture is evaporated to dryness. The dyestuli sulfomc acld wlth y -p y -py or y obtained dyes cotton and regenerated cellulose rayon in coupling dianisidine tetrazotized with the last named 75 greener shades of grey than the dyestufi of Example '1.

5 6 The dyeings arefast to'light and washing. and the formula 1. 25 parts of sodium bicarbonate are added thereto, of the dyestufi is approximately as follows: t followed by slow addition of a neutral solution of 30.4

1 .0 o... Cu.-O

do i NaO S. so lsa BOINQ Example) parts of 2-naphthol:3,6-disulfonic acid in 400 parts of A Weakly alkalinc Solution of 23.9 pans of water so as to obtain a balance point where no further naphthol 3 sulfonic acid and 6.9 parts. qf sdipm mung tetrazo compound remains in the mixture. The resulting 350 parts of Water am; slowly addedttq a Stirred acid slurry is added to a solution of 23.9 parts of 7-amino-1- solution of 29 parts hydrochloric acid in loo 2 naphthol-3-sulfomc acid and 12 parts of sodium hydroxide parts of water, cooled with 400 parts of ice. The mixin 400 Parts of wgter' Afier Stirring f hours to ture is stirred 1 to 2 hours to complete diazotization, complete the l g reaction Slutty treated with and then added to a neutral solution of 50 parts of so- 85 R Of hyflrochioric .acld followed by a dium acetate and A pans of 3 methyl l p sulfophenyl solution of 7 parts of sodlum nitrite in 20 parts of water.

5-pyrazolone in 200 parts of water. Coupling is com, 25 The miXtu-r? is Stirred about one hour to complete the plated in 1 to 2 hours, the final pH being 41 The pH diazotization and then added to a solution of 28 g. of is adjusted to 7.5. by adding caustic soda. The resulting 3m.et-hyl=1'PSUIfOPhQHYL-S'PYIazolone and 17 of solution is slowly to tetrazotized dianisidine prepared diKlm hydroxide 51300 Parts of Wateri mixture is by tetrazofizing 244 parts of dianisidine as described in agitated several hours to complete the reaction. A solu- Example 1 and buflrering the composition with 25 parts 30 tron of 62.5 parts of hydrated copper sulfate and 46 parts of sodium bicarbonate. A balanced coupling occurs as of e hylamm 400 Parts of Water 15 added and e shown by disappearance of tetrazotized dianisidine from resulting P Y 1S beam? at 85 to 90 'C- for 4 hours. the mixture. A solution of 31.9 parts of 8-amino-1-naph- The resulting dyesmfi evaporated to y This thol-3,6-disulfonic acid and 30 parts of sodium carbonate new dyestulf has the following formula:

NaOaS. 0-(:Ju 0 O (Pu-O 8 l i a N Na0=8 SOaNu in 200 parts of water is rapidly added. After stirring This product dyes cotton and regenerated cellulose several hours, a solution of 62.5 parts of a hydrated 50 rayon in greenish gray shades of outstanding fastness to copper sulfate and 46 parts of methylamine in 400 parts light and washing. If in the above example 36.1 parts of water is added and the combined solutions heated of 8-acetylarnino-1-naphthol-3,6-disulfonic are substituted 3 to 4 hours at 85 C. to form the copper complex. for 30.4 parts of 2-naphthol-3,6-disulfonic acid an ex- The dyestufif is salted out, filtered from the resulting cellent product results which dyes cotton and rayon conslurry, and dried. The product dyes cotton and regenersiderably greener shades of gray.

ated cellulose rayon in greenish-grey shades having ex- Similar results are obtained in the foregoing examples cellent fastness to light and washing. The dyestufi has by substituting other naphthol and aminonaphthol sulthe following formula: fonic acids for 8-amino-l-naphthol5,7- or -3,6-disulfonic 0 N=I 1- 0H, NaOaS- N=N--?H-%J 00 N N some Example 6 acids employed for preparing the dyestuffs described 24.4 parts of dianisidine are tetrazotized as inExample above. Similarly, in addition to the 6- or 7-amino-1- 7 naphthol-S-s'ulfonic acid and 7-arnino-1naphthol- 3,6-dig i g ample r dep ti g lthc. 8 1 sulfonic acid of the examples, other 6- or 7-amino-l- 0f the IIIVFHUQB' i la l naphthol-sulfonic acids or -disulfonic acids can be em- We claim: V V ployed in the examples with similar results; A pp trlsazo dyestufi yielding y shades on Instead of B-carboxyor 3-methyl-1-phenyl-5-py azov 5 cellulosic fiber, "having the-following general formula: lone or the p-sulfo derivatives thereof, other pyrazolones ji 0 1 0 cu 1 such as 3-methyl-5-pyrazolone itself or 3-methylor 3- 1 r V i carboxy-l-(m-sulfophenyl)-5-pyrazolone can be' substi- V .N= N=N--M-N=NPy tuted with similar results. The sulfophenyl pyrazolones are preferred.

The preferred method of preparing the dyestuffs of the sulfonic acid end coupling component containing not invention involves tetrazotizing 1 mol of dianisidine, coumore than two sulfonic acid groups, M represents the pling in alkali metal bicarbonate buffering solution with radical of a middle coupling component of the class con- 1 mol of a 6- or 7-amino-l-naphthol-sulfonic acid or sisting of 6- and 7-amino-l-naphthol-m0noand di- -disulfonic acid, rediazotizing and coupling with 1 mol 15 sulfonic acids, and Py represents the radical of a pyof the pyrazolone end compound, and finally coupling razolone end component." a with 1 mol of a naphtholor aminonaphthol-monoor g 2. A dyestuff as defined in claim 1, wherein the pyrazdisulfonic acid. The product is then converted to the clone coupling component is the radical of a l-sulfocopper complex by heating at temperatures of 75-100 phenyl-S-pyrazolotie. C. in a solution of copper sulfate with a water-soluble 20 3. A coppered trisazo dyestufi having the following primary aliphatic amine or ammonia. formula: a

Ntr, (J-Qt:

- 00 N NaO1S S OaNa SOsNB The dyestuffs can be recovered by salting out or by 4. A coppered trisazo dyestufi having the following evaporating the resulting solution to dryness. formula:

NH, 0--c :u o 0 7u-0 5 CH: NaO S- '1 I=N N=N N=N-(I3H-t 1 00 NaOaS fiiO Na Other variations and modifications, which will be ob- 5. A coppered trisazo dyestufi having the following vious to those skilled in the art, can be made in the formula: v a

E i COONa NaOzS N=N N=N N=N-CH- $0 bi NaOzS \N/ 10 wherein Q represents the radical of a 8amino-l-naphthol 6. A coppered trisazo dyestuff having the following formula:

SOaNn 7. A coppered trisazo dyestuff having the following formula:

NH, )-gu---o 0- -gu o I I =N N= CH5 NaOzS SOgNa NaO S N=N-cH-% (12 N N I SOaNa References Cited in the file of this patent UNITED STATES PATENTS 2,644,813 Ruckstuhl et a1. July 7, 1953 2,715,120 Ruegg et a1. Aug. 9, 1955 UNITED STATES- PATENT. OFFICE CERTIFICATE or CGRRECT'ION Patent No. 2,970,993 February 7, 1961 Jack F. Morgan et a1.

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 43, for "groups" read group column 2, line 3, for "desulting triazo" read resulting trisazo column 5, line 28, after "slowly" insert Signed and sealed this 6th day of February 1962.

(SEAL) Attest:

ERNEST W. SWIDEB DAVID L. LADD Att i g f r Commissioner of Patents UNITED STATES PATENT OFFICE I CERTIFICATION OF CORRECTION Patent No. 29970 February I, 196

Jack F0 Morgan et ale It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Columns 5 and 6 lines 35 to 48 the formula should appear as shown below instead of as in the patent:

' N-CHMWMCIICH Signed and sealed this 3rd day of Joly I962.

(SEAL) Attest:

ERNEST W. SWIDER Attesting Officer DAVID L. LADD Commissioner of Patents 

1. A COPPERED TRISAZO DYESTUFF YIELDING GREY SHADES ON CELLULOSIC FIBER, HAVING THE FOLLOWING GENERAL FORMULA: 